CentOS8.2安装docker
CentOS8.2安装docker1.安装必要工具sudo yum install -y yum-utils device-mapper-persistent-data lvm22.安装repo包sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo3.更新 Docker-CE（CentOS8.2中没有fast参数）sudo yum makecache4
